横向
1
Line dividing two countries
4
Ocean between Americas and Europe/Africa
6
Distance east or west of prime meridian
7
Total number of people in an area
8
Ridge of rock or coral near the surface
9
Low-lying land surrounded by higher ground
纵向
2
Goods sold to another country
3
Vast body of salt water
5
Cold treeless Arctic plain
6
Distance north or south of equator
10
Dry land with little rainfall
11
Large natural stream of water
12
Large slow-moving mass of ice